In order to make sure that the Buffett Rule, which would increase taxes on incomes over a million dollars, wouldn't pass, the GOP filibustered it. Their main reason was that $4.7B this would generate simply isn't enough to make the tax worthwhile. As Jon Stewart pointed out on tonight's Daily Show, that stance doesn't quite gel with the GOP's take on money for Planned Parenthood, which, while significantly less than $4.7B, is too much to for the government to be spending.